<template>
  <view v-if="goods_info.goods_price || ''">
    <swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" :circular="true">
      <swiper-item v-for="(item,i) in goods_info.pics" :key="i">
        <image :src="item.pics_big" @click="preview(i)"></image>
      </swiper-item>
    </swiper>
    
    <view class="goods_info_box">
      <view class="price">￥{{goods_info.goods_price}}</view>
      <view class="goods_info">
        <view class="goods_name">{{goods_info.goods_name}}</view>
        <view class="icons">
          <uni-icons type="star" size="18" color="gray"></uni-icons>
          <text>收藏</text>
        </view>
      </view>
      <view class="yf">快递：免运费</view>
    </view>
    <!--  rich-text可渲染带有标签的内容 -->
    <rich-text :nodes="goods_info.goods_introduce"></rich-text>
    
    <!-- 底部购买加入购物车tabbar -->
    <view class="goods_nav">
      <!-- fill 控制右侧按钮的样式 -->
      <uni-goods-nav :fill="true" :options="options" :buttonGroup="buttonGroup" @click="onClick" @buttonClick="buttonClick"></uni-goods-nav>
    </view>
  </view>
</template>

<script>
  // 从vuex中按需导出 mapstate辅助方法
  import { mapState } from 'vuex'
  import { mapMutations } from 'vuex'
  import { mapGetters } from 'vuex'
  
  export default {
    // 调用mapstate方法 把store中的模块  通过计算属性 映射加载到当前页面
    computed:{
      ...mapState('m_cart', ['cart']),
      ...mapGetters('m_cart', ['total'])
    },
    data() {
      return {
        goods_info:{},
        // 左侧按钮组的配置对象
        options:[
          {
            icon:'shop',
            text:'店铺'
          },
          {
            icon:'cart',
            text:'购物车',
            info:2
          }
        ],
        // 右侧按钮组的配置对象
        buttonGroup:[
          {
            text:'加入购物车',
            backgroundColor:'#ff0000',
            color:'#fff'
          },
          {
            text:'立即购买',
            backgroundColor:'#ffa200',
            color:'#fff'
          },
        ]
      };
    },
    watch:{
      total:{
        handler(newVal){
          const findResult = this.options.find(x => x.text === '购物车')
          if(findResult){
            findResult.info = newVal
          }
        },
        //声明此监听器  页面初次加载完毕后立即调用
        immediate: true
      }
    },
    onLoad(options){
      const goods_id = options.goods_id
      this.getGoodsInfo(goods_id)
      // console.log(this.goods_info);
    },
    methods:{
      ...mapMutations('m_cart',['addToCart']),
      async getGoodsInfo(goods_id){
        const {data:res} = await uni.$http.get('/api/public/v1/goods/detail',{goods_id})
        // console.log(res);
        if(res.meta.status !== 200) return uni.$showMsg()
        // 添加block解决 图片之间的空白间隙
        //解决 .webp 格式图片在 ios 设备上无法正常显示的问题：
        res.message.goods_introduce = res.message.goods_introduce.replace(/<img/g,'<img style="display:block;"').replace(/webp/g,'jpg')
        this.goods_info = res.message
      },
      // 点击轮播图 实现大图预览效果
      preview(i){
        uni.previewImage({
          // 当前图片的位置
          current: i,
          urls: this.goods_info.pics.map(x => x.pics_big)
        })
      },
      onClick(e){
        // console.log(e);
        if(e.content.text === '购物车'){
          uni.switchTab({
            url:'/pages/shop-car/shop-car'
          })
        }
      },
      buttonClick(e){
        if(e.content.text === '加入购物车'){
          const goods = {
            goods_id: this.goods_info.goods_id,
            goods_name: this.goods_info.goods_name,
            goods_price: this.goods_info.goods_price,
            goods_count: 1,
            goods_small_logo: this.goods_info.goods_small_logo,
            goods_state: true
          }
          this.addToCart(goods)
        }
      }
    },
  }
</script>

<style lang="scss">
swiper{
  height: 350px;
  image{
    width: 100%;
    height: 100%;
  }
}
.goods_info_box{
  padding: 10px;
  padding-right: 0;
}
.price{
  color: #C00000;
  font-size: 18px;
  margin: 10px 0;
}
.goods_info{
  display: flex;
  justify-content: space-between;
}
.goods_name{
  font-size: 13px;
  padding-right: 10px;
}
.icons{
  width: 120px;
  font-size: 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border-left: 1px solid #efefef;
  color:gray
}
.yf{
  margin: 10px 0;
  font-size: 12px;
  color: gray;
}
.goods_nav{
  position: sticky;
  bottom: 0;
  left: 0;
  width: 100%;
}
</style>
